Active Directory Schema Changes

Applies to: Exchange Server 2007

Topic Last Modified: 2006-09-25

Microsoft® Exchange Server 2007 adds many new attributes and classes to the Active Directory® directory service schema and makes other modifications to existing classes and attributes. This topic provides information about the Active Directory schema changes that occur when you install Microsoft Exchange.

The Active Directory schema changes listed in this document represent only those changes that are made by Exchange 2007. This topic does not include information about changes that are made when Microsoft Exchange Server 2003 is installed on a Microsoft Windows Server 2003 network.

The following tables contain the new object identifiers that are used by Exchange 2007 in an Active Directory forest. Many objects are grouped into ranges. For instance, 1.2.840.113556.1.4.7000.102.50477 - 1.2.840.113556.1.4.7000.102.50481 represents five objects. A range of objects does not necessarily mean they are related by function.